Best solution to move OST into Outlook PST- Freeware OST to PST Software is master to repair Outlook OST File & convert offline storage (.ost) file to a personal storage (.pst) file, MSG and EML up to 25 data items. OST to PST Converter utility is standalone application to remove each type OST Corruption plus maintains the data integrity. Check OST to PST Freeware Converter & explore how to convert OST File to PST with attachments.